System and method for generating high-frequency and mid-frequency audible sound via piezoelectric actuators of a haptic keyboard
A haptic keyboard based sound system of an information handling system comprising a coversheet to identify a plurality of key locations of a haptic keyboard and a first key having a piezoelectric element for haptic tactile feedback upon key actuation, a support layer, a contact foil placed between the coversheet and support layer, and a haptic feedback and piezo sound controller operatively coupled to the contact foil to receive the mid-frequency portion of an audio signal and the high frequency portion of the audio signal from an audio controller operably connected to the haptic feedback and piezo sound controller, and send a piezo audio signal to the piezoelectric element to cause the piezoelectric element to generate a mid-frequency and high-frequency sound audio according to the received mid-frequency portion of an audio signal and the high frequency portion of the audio signal.
1. A haptic keyboard based sound system of an information handling system, comprising:
a coversheet to identify a plurality of key locations of a haptic keyboard and a first key having a piezoelectric element for haptic tactile feedback upon key actuation;
a support layer;
a contact foil placed between the coversheet and support layer;
a haptic feedback and piezo sound controller operatively coupled to the contact foil to:
receive the mid-frequency portion of an audio signal and the high frequency portion of the audio signal from an audio controller operably connected to the haptic feedback and piezo sound controller; and
send a piezo audio signal to the piezoelectric element to cause the piezoelectric element to generate a mid-frequency and high-frequency sound audio according to the received mid-frequency portion of an audio signal and the high frequency portion of the audio signal.
2. The haptic keyboard based sound system of claim 1 further comprising:
a low-frequency speaker operably connected to the audio controller; and
the audio controller transmitting a low-frequency audio signal portion of the audio signal to the low-frequency speaker to cause the low-frequency speaker to emit low-frequency sound audio.
3. The haptic keyboard based sound system of claim 1 further comprising:
the haptic feedback and piezo sound controller to:
send a plurality of piezo audio signals to plural piezoelectric elements associated with a plurality of keys of the haptic keyboard to cause the piezoelectric elements to generate mid-frequency and high-frequency sound audio according to the received mid-frequency portion of an audio signal and the high frequency portion of the audio signal.
4. The haptic keyboard based sound system of claim 1 further comprising:
the haptic feedback and piezo sound controller to:
send the plurality of piezo audio signals to plural piezoelectric elements associated with a plurality of keys of the haptic keyboard that are not currently being actuated to cause the piezoelectric elements to generate mid-frequency and high-frequency haptic sound.
5. The haptic keyboard based sound system of claim 1 further comprising:
a haptic touchpad having an array of touchpad piezoelectric elements for haptic tactile feedback upon touchpad actuation;
the haptic feedback and piezo sound controller to:
send a piezo audio signals to a touchpad piezoelectric element associated with the haptic touchpad to cause the haptic touchpad piezoelectric element to generate mid-frequency and high-frequency haptic sound audio according to the received mid-frequency portion of an audio signal and the high frequency portion of the audio signal.
6. The haptic keyboard based sound system of claim 1 , wherein the audio controller divides the received mid-frequency and high-frequency portion of the audio signal from a low-frequency audio signal portion of the audio signal for an audio playback.
7. The haptic keyboard based sound system of claim 1 , wherein haptic feedback and piezo sound controller sends piezo audio signals to piezoelectric elements situated beneath a portion of a C-cover of the information handling system surrounding the haptic keyboard and a haptic touchpad.
8. A haptic keyboard based sound system of an information handling system, comprising:
a coversheet to identify a plurality of key locations of a haptic keyboard;
a support layer;
a contact foil placed between the coversheet and support layer;
a haptic sound controller operatively coupled to the contact foil to:
receive a high-frequency audio signal from an audio controller operably connected to the haptic sound controller;
identify a first of a plurality of piezoelectric elements placed between the contact foil and the support layer associated in memory with high-frequency audio; and
send a first haptic sound feedback control signal to the first of the plurality of piezoelectric elements to cause the first of the plurality of piezoelectric elements to generate a high-frequency haptic sound feedback according to the high-frequency audio signal.
9. The haptic keyboard based sound system of claim 8 further comprising:
a low-frequency speaker operably connected to the audio controller; and
the audio controller transmitting a low-frequency audio signal to the low-frequency speaker to cause the low-frequency speaker to emit low-frequency audible sound.
10. The haptic keyboard based sound system of claim 8 further comprising:
the haptic sound controller to:
receive a mid-frequency audio signal from the audio controller;
identify a second of the plurality of piezoelectric elements associated in memory with mid-frequency audio; and
send a second haptic sound feedback control signal to the second of the plurality of piezoelectric elements to cause the second of the plurality of piezoelectric elements to generate a mid-frequency haptic sound feedback according to the mid-frequency audio signal.
11. The haptic keyboard based sound system of claim 10 , wherein the first of the plurality of piezoelectric elements is situated beneath one of the plurality of key locations of the haptic keyboard, and the second of the plurality of piezoelectric elements is situated beneath a touchpad.
12. The haptic keyboard based sound system of claim 8 , wherein the first of the plurality of piezoelectric elements is situated beneath one of the plurality of key locations of the haptic keyboard.
13. The haptic keyboard based sound system of claim 8 , wherein the first of the plurality of piezoelectric elements is situated beneath a touchpad.
14. The haptic keyboard based sound system of claim 8 , wherein the first of the plurality of piezoelectric elements is situated beneath a portion of a C-cover of the information handling system surrounding the haptic keyboard and the touchpad.
15. A haptic keyboard based sound system of an information handling system, comprising:
a low-frequency speaker operably connected to an audio controller;
the audio controller transmitting a low-frequency portion of an audio signal to the low-frequency speaker separated from a mid-frequency portion of the audio signal and a high frequency portion of the audio signal to cause the low-frequency speaker to emit low-frequency sound audio;
a coversheet to identify a plurality of key locations of a haptic keyboard and a plurality of keys having a plurality of piezoelectric elements for haptic tactile feedback upon key actuation;
a support layer;
a contact foil placed between the coversheet and support layer;
a haptic feedback and piezo sound controller operatively coupled to the contact foil to:
receive the mid-frequency portion of the audio signal and the high frequency portion of the audio signal from an audio controller operably connected to the haptic feedback and piezo sound controller; and
send a piezo audio signal to the piezoelectric element to cause the piezoelectric element to generate a mid-frequency and high-frequency sound audio.
16. The haptic keyboard based sound system of claim 15 further comprising:
the haptic feedback and piezo sound controller;
haptic feedback and piezo sound controller receives the mid-frequency portion of the audio signal and the high frequency portion of the audio signal from an audio controller that is a combined mid frequency and high frequency portion of the audio signal as separated from the low-frequency portion as at the audio controller.
17. The haptic keyboard based sound system of claim 15 further comprising:
the haptic feedback and piezo sound controller;
haptic feedback and piezo sound controller receives the mid-frequency portion of the audio signal and the high frequency portion of the audio signal from an audio controller, where the high frequency portion of the audio signal is a separated high-frequency portion and the mid-frequency portion of the audio signal is a separated mid-frequency portion as filtered at the audio controller.
18. The haptic keyboard based sound system of claim 17 further comprising:
the haptic feedback and piezo sound controller to;
identify a first of a plurality of piezoelectric elements placed between the contact foil and the support layer associated in memory with high-frequency audio;
send a first piezo audio signal to a first of the plurality of piezoelectric elements to cause the first of the plurality of piezoelectric elements to generate a high-frequency haptic sound feedback according to the separated high-frequency portion of the audio signal;
identify a second of the plurality of piezoelectric elements associated in memory with mid-frequency audio; and
send a second haptic sound feedback control signal to the second of the plurality of piezoelectric elements to cause the second of the plurality of piezoelectric elements to generate a mid-frequency haptic sound feedback according to the separated mid-frequency portion of the audio signal.
19. The haptic keyboard based sound system of claim 18 , wherein the first of the plurality of piezoelectric elements is situated beneath one of the plurality of keys of a haptic touchpad.
20. The haptic keyboard based sound system of claim 18 , wherein the second of the plurality of piezoelectric elements is situated beneath a haptic keyboard.